... rural areas around Dianchi is one of the main reasons that cause Dianchi’s eutrophication, which includes village sewage, agriculture wastewater, storm water runoff and agricultural solid waste, ... the pollutants concentration was low in the rain season (from May to October). The data from the local weather station showed that the average annual rainfall and evaporation was 802mm and 2093mm, ... order to make full use of the land advantage to strengthen ecological and scenical effect of ecological system. The area was 2000 m 2 and hydraulic loading rate was 4cm/d in the free-surface constructed...